4S 



NORTH AMERICAN BATS. 



descriptions of Dr. Bachiuau arc also very imperfect. The most 

 valuable points — such as the attachment of wing membrane to the 

 feet, and the number of molars — being omitted. 



In the new species which I have deemed it necessary to intro- 

 duce, I much regret that from the above list I could not retain 

 any names. As objectionable as it is to increase the number of 

 species of Vespertilionidse when there are so many yet unde- 

 termined, it would be still more so to apply to forms thought to 

 be distinct names to which no specific characters have been 

 attached, or which, if applying to good species, are descriptive of 

 peculiarities not found in those about to be given. 



The species may be arranged as follows : — 



1. luternal basal lobe of ear acute. 



a. Point of tail very > Ears longer than head 



slightly exserted ' Ears as long as head 



b. Point of tail decidedly exserted. 



Tragus linear, turned outward 

 Tragus linear, erect. 



Color beneath chestnut-brown . 



Color beneath whitish 



2. Internal basal lobe of ear obtuse, rounded . 



V. evolis. 

 V. nitidus. 



V, subulatus. 



V. yumanensis. 

 V, affinis. 



V. lucifuyus. 



Tespertilio eTotis, Alle>-, n. s. 

 Fig. 42. Fig. 43. 



Description. — Head rather small; face pointed, moderately 

 whiskered ; snout produced ; ears large, high, erect, oval, not 



